Combination steel and concrete building construction.



G, H. SNYDER.

COMBINATION STEEL AND CONCRETE BUILDING CONSTRUCTION.

APPLICATION FILED DEC. 21, 1910.

1,086,866, Patented Feb. 10, 1914.

2 SHEETS-SHEET 1.

G. H. SNYDER.

COMBINATION STEEL AND CONCRETE BUILDING CONSTRUCTION.

APPLICATION FILED DEC. 21, 1910.

1,086,866. Patented Feb. 10, 19m

2 SHEETSBHEET 2.

UTED STATES PTNT QFFIQE;

CHRISTOPHER I-I. SNYDER, OF BERKELEY, CALIFORNIA.

COMBINATION STEEL AND CONCRETE BUILDING CONSTRUCTION.

1,ose,see.

To all whom it may concern Be it known that I, CHRISTOPHER H. SNYDER,citizen of the United States, residing at Berkeley, in the county ofAlameda and State of California, have invented new and usefulImprovements in Combination Steel and Concrete Building Construction, ofwhich the following is a specification.

This invention relates to building construct-ion, and particularly tocombined steel and concrete building construction.

The ob ect of this invention'is to provide a reliable and practicalreinforcing structure applicable to steel and cast iron columns ofvarious designs, to which reinforcing structure may be readily connectedthe usual reinforcing wires, rods or netting commonly employed in theerection of concrete slabs and floors.

The invention consists of the parts and the combination and constructionof parts as hereinafter more fully described and claimed, havingreference to the accompanying drawings, in which- Figure 1 is a sideelevation of an H- column to which has been applied the stirrup or knee.Fig. 2 is atransverse section through the column showing the knee orgirdle-members attached thereto. Fig. 3 is av transverse sectional viewof a steel column erected of channel irons with the knee straps or thegirdle applied. Fig. 4 is a side elevation of a cast iron column onwhich the knee flange or girdle is shown as being cast. Fig. 5 is a planview of the cast iron column. Fig. 6 is a diagrammatic view of thereinforcing rods as attached to the supporting girdle.

In the art of reinforced concrete construction, it is desirable toprovide a sub stantial and practical means for connecting thereinforcing rods, wires or other ele ments to the vertical columns ofthe structure in the most secure and permanent man ner, and toaccomplish this substantial construction in a simple method, both asregards the form of the elements and the saving of labor. To this end,my invention comprehends attaching to or forming with the buildingcolumns, such as are indicated at A in the several views, a girdle, as2, comprised of sections 2 of channel irons securely bolted with theirbacks against the columns A, and which sections 2 have their lowerflanges perforated, as at 3, for the re- Specification of LettersPatent.

Application filed December 21, 1910.

Patented Feb. 10, 1914.

Serial No. 598,805.

ception of brace or knee members 4, which are here shown as being madeof stout wire, the lower ends of which are suitably headed over afterinsertion through the perforations 3 in the girdle 2, and the upperportions of the rods are then bent forward at a suitable angle relativeto the column. Through the eyes 5 formed on the upper ends of the rods 4is threaded a stout rod, as at 6, forming a stirrup which may be in theform of a square, as in Fig. 2, or in the form of a circle, as in Fig.6.

The girdle 2 may be attached to the column A after the same has beenerected in a building at such height along its length as is determinedby the relative height between the floors in the building. The lowerperforated flange of the girdle shown in Fig. 1 forms the supportingknee of the concrete floor or slab, as indicated at 8, when the same hasbeen tamped in firmly around the reinforcing nest formed by the networkof the inclined brace rods 4 and the horizontal band or stirrup 6, whichis mounted in the eyes at the upper end of the brace rods 4.

After the member 6 has been threaded through the several eyes 5 on thebrace rods at, the usual tension rods or reinforcing wires, as indicatedat 9, may be attached to the girdle 2 in a substantial manner and theconcrete tamped over the nest and the reinforcing wires to entirelyinclose the same.

When the design of the building calls for cast iron columns such as areindicated in Figs. 4c and 5, these columns are provided with anintegrally cast girdle 2 which may be of suitable diameter and locatedat the proper distance in the length of the column and perforated toreceive the inclined knee l, and if the column A be circular in crosssection the brace rods 4 may be arranged radially about the column andthe girdle, wire or bar 6 may be formed into a circle, thus making asubstantial reinforce for the applied concrete.

The girdle member 2 not only has the function of forming a support forthe lower ends of the knee rods 4, but by reason of its transverseprojection from the body of the column A, the girdle 2 forms a. supportfor the shear or pressure of the concrete when it has hardened inposition.

If desired, further projections 2 encir cling the column A may beprovided in order to support the shear or load of concrete, as

shown in Fig. 1. In this instance the projections 2 are formed of angleiron attached to the body of the column, and upon these auxiliarybrackets may be supported the horizontal fabric 9.

Having thus described my invention, what I claim and desire to secure byLetters-Patent, is-

I. In a building construction, a supporting column, a reinforcingstructure attached thereto for supporting concrete, said reinforcingstructure comprising a girdle rigid with the supporting column andhaving a plurality of perforations, upwardly projecting knee memberssupported in said girdle and having eyes at their upper ends, and astirrup threaded through the eyes.

2. The combination in a building construction, of a supporting column, aperforated flange forming a girdle about the column, upwardly inclinedknee members having their lower ends inserted in the perfoi,os6,866

rations in the girdle, and having eyes at their upper ends, a stirrupsupported in said eyes, and a reinforcing element attached to saidstirrup.

3. The combination inabuilding construction, of a supporting column, aperforated ilange forming a girdle about the column, upwardly inclinedknee members having their lower ends inserted in the perforations in thegirdle, and having eyes at their upper ends, a stirrup supported in saideyes, reinforcing elements attached to said stirrup, and a concrete bodyinclosing the aforesaid structural elements.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

CHRISTOPHER I-I. SNYDER.

itnesses FREDERICK E. MAYNARD, CHARLES EDELMAN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. G.

